Added support for unassigning JIRA issues#1

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wschroeder wants to merge 2 commits intomcallaway:masterfrom

wschroeder:master

Commits on Oct 16, 2015

It is now possible to unassign assignees by specifying -A Unassigned.
William Schroeder
committed
Add help for the new Unassigned feature.
William Schroeder
committed